Cranberry Polka Dot aka Inverted Thumbprint Glass Tumbler

Wonderful cranberry polka dot aka Inverted Thumbprint glass tumbler by an unknown maker. It is approximately 3.62 inches tall, and 2.87 inches in diameter and in good condition with no nicks, chips or cracks, though there are a couple of pinpoint inclusion bubbles. There are 4 rows and 9 dots around; the bottom is concave with a thing ground ring on the bottom that shows table wear.